Improvement in stamp quartz mills



IMPROVEMENT 11N stuur nnntrzzjrutts. t,

y WILLIAM weleer, or .New ross, N. Y., AssicNoRfro ."Join'v` n. `chanvre,

` or SAME-PLAGE- A Lene/Patat N0..60,11o, aan Novembef'ev, 1866.

. l SPECIFICATION- T0 ALL WHOM 'IT MAY GONCERN: p i i I i Be it known that I, WILLIAM WRIGHT, of the city, county, and State of New York, have invented certain newA and useful improvements in Stamping Mills for Crushing land Pulverizing Orcs and other substances, appli,- lx cable in part also to hammers; and I do hereby declare that the following is a full, cleariand exact description of the same, reference being had to the accompanying drawings, lforming part of this specification, in which-,-

` Figure is an elevation of a stamping mill constructed according to my invention. n 4, Figure 2 is a vertical section at yright angles to tig. 1, in the plane indicated `by the line fr :nota that ligure. s Figure 3 is a plan partly in section in the plane indicated in the liney y-of iig;` l. Figure 4 is a horizontal section of the same'in the.` plane indicated in the line z e in fig. 1. Similar letters of reference indicate corresponding parts in the several figures. l y f The main -object of this invention is to pro-vide for the operation of the stampsinstamping mills by the direct action of steam above and, below pistons of direct-action engines attached directly to the stamp'rods; but the invention his in part applicable to stamping mills in which the stamps are operatedin other ways. To facil itate the `directapplication,ot` steam power tothe stamps, as above mentioned, and to obtain an equal `delivery` of the ground material all laround the mill, the stamps, when more than two are used, instead of being arranged in a row,"are arranged in sgroup,I and they, and, the battery` entirclygsurroundedloby`tscreen surrounded by a troughufor the reception of the ground material, and the ore is fed into the mill in the centre l of-the -group of stamps.y The induction and eduction of steam to and from the steam cylinders in which the l pistons are contained, are effected by valves andy valve gear operated by the piston and stamp rods, in such manner as to permit` the turning of the stamps as much as necessary; and the steam cylinders, with the valves and valve i gearing, arel al so applied as to be capable ot' being lowered by degrees as the stamps wear away with use, and to thereby maintain a uniform or nearly uniform stroke and clearance of the pistonswithin the steam cylinders. The same adjustment of the cylinders is applicable to steam hammers` I p y lo` enable others to malte' and use my invention, I will proceed to describe it with reference to the drawings. A represents a circular-cast-iron bed-plat`e, in which is formed or placed the battery, B, and which forms the base of the apparatus. On,- this bed-plate there are erected, alt equal distances apart, four pillars, C, for the f support of the horizontal sole-plate, A1, of vertical steam cylinders E E, and their `surrounding steam jacket, D, there being one steamcylinder. fr each of the stamps, F, each containing a piston, P, secured upon the ;lii`t`ingrod, P', of one of the stamps. There may be any number of stamps, pistons, and steam cylinders, but I -prefer,`as `a" Lmattei' ot' conveniencmfthat therephall be, and 'have represented, four arranged inV the form of a square `c1' ati-equal distances from ai vertical lihe drawn through the centre of the: battery, such arrangement l ,providing for the feeding of the ore i to the centre of the battery and group of stamps, and for-its equal dis.- tribution 'to all the stamps, and for an equal delivery of the crushed ore on all `sides of the mill through the screen, S, which surrounds, the battery andstamps, and into the trough, A2, whichis provided in the bed-plate,

VA, around the screen. 'To simplify construction, the cylinders and their sole-plate and surrounding jacket `are all cast tog-ether. O n the upper parts ofthe pillars, GC, 4'which pass through holes in the sole-plate A1, there are screw-threads,y Z Z, fitted with nuts, Gr G and H H, below and abovcthe sole-plate, the lower nuts, G G r, supportingthe`usole-plate and cylinders, and the upper ones, H H, holding them down. i By screwing down the nuts Gr G the sole-plate and the steam cylinders, and all their attached parts, which will be hereinafter described, may be' lowered bodily and so adjusted to the battery daily, or as often as is necessary to compensate for the wear of the stamps, and -so maintain a uniform or nearly uniform clearanceI between the pistons and "the tops undV boti L toms of the cylinders. In order that the sole-plate, A, may easily be kept horizontal in its adjustment, and all the cylinders may be lowered'equally, there are gauges, consisting of scales, h, of equal parts, in each pillar, C,

and indicesd', attached to -the sole-plate opposite each pillar. -The stamp and `piston rods, P-','pas`s through smiling-boxes, a, in the bottoms of the cylinders or the s0le-plate,A1,-and their upper/parts enter into hollow col-` umns, N N, which formportions of orare firmly secured to the steam-cylinder covers, the saidcolumns being concentric withl the cylinders and 'bored out to form guides to the upperpar-ts of the rods," und beingzclosedat t the top. The steam cylinders are furnished with valve chests, I I,l of which there may be a-'separate one for each steam cylinder, but of which, to simplify construction, I prdttide only two, each @being commonfto `two of the cylinders, as shown vlin iig'. 1,and bothsupplied'with steamthrough branches, ,I2 I, of onegsteain` pipe,

whichbrings the steam from the boiler. Each cylinder sfurnsliedwith a, horizontally working slide-valve, V,.

by the movement of which the induction of the steam to the cylinder from its respective chest, I, sudthe educ tion of the steam from-the cylinder into thek jacket, D,.which surrounds all the cylinders, are efectedi The valves maybe of any suitable construction ;y but in `order that they may work with little friction, I prefecto make them'of thepiston kiand, or as-represented g. that is,-to say, double, so.. that each may work between two seats, :and be thereby balanced to the pressureyof the steam, except that the said pressure f will -act upon a portion of its inner end of equal area-withthe stein J, the outer end of which is exposed tothe l atmosphere. The opposite faces of the valves resembleih form 'theordinary-short three-port siidevalve, and workover three ports b c d, of which the innermost one, b, communicates, as shown in-figD 2, with the lower end of itsrespective cylinder, the outermost one, o, with the upper end of the said cylinder, and .the middle one, d; withthe exhaust-jacket D, to which the eduction pipe D is attached. The valve stems J wokthrough stuffing i boxes e in thevalvechest, and their outer ends are connected with the lower ends ofdeversK, which work on xed horizontal `fulcrum shafts'L, suitablyY attached to the steani cylinders. The upper 'ends of these levers I are connected with horizontal rods j', which work' through standing-boxes f in the sides of the hollow columns N, hereinbefore described: The upperterminal portions of the piston and stamp rods P' are made conical, as shown at g in lig. 2, for the -purpose of acting like Wedges upon the inner 'ends of thel rods M, and thereby electing through the levers K the movement of the valves in an inward. direction as theA pistons rise, and se admitting steam .through the ports a to the upper ends of the cylinders, .to produce the',downwardA movement of fr the pistons' and stamps. The 'outward movement 'of thevalves, .to produce the admission -of steam through the ports b to the lower ends ofthe cylinders, for lifting the pistons and stamps, is eiected by the pressure of steam uponthe inner ends lof -thevalves'as the conical upper portions of the rods P deseendand permit the rods M to move inward. i Springs Q are applied to -press outward against the lower parts of the-levers, Vfor the purpose of' keeping the rods M in contact with the piston and'stamp rods when no steam is in the vhl el chests,l and thereby keeping the valves in position 'to commence operation as soon as asufficient pressure of steam is admitted to the valve chestsf The samelmovement of each valve which admits'steam'to one Aend of its respective cylinder. permitsthe eduction of steam from the opposite end, in the same manner as is the casewith the ordinary short slide-valve employed in steam engines.. The inner ends of the rods f are exposed to the 'pressure of steam which enters the hollow columns N, and this in some degree counteracts the outward 'pressure upon the valves i but the lowerarms of the levers Karo so much longer than the upper ones that the said rods'are always kept 1 properly incontact with the conical parts g of the piston and stamp rods, to insure theoperatio'n ofthe valves.

The valve gear of each cylinder being entirely independent of that of the others, each stamp will be worked separately by its own engine, and each may be thrown out of operation without interfering with jth'eA others; y and the upper ends ef-thcpistoniandstamprodsbeingof conicalforrupwillalways .cause or 'permit theproper operation cfthe valves, notwithstanding that the-stamps and pistons are free to turn in their operation- The 1 valves may be operatedby hand, if desirable at any time,vby means of a suitable hand' gear attached to the leversK.v i i To provide for an equal vdistribution of the orc or other material to be crushed to all of the stamps, hopper-s l T are arranged on opposite sides of the group of stamps, and from these hoppersinclined spouts lead to a central spout T2, which is connected with a central openingfin thecoverSl of the screen S,and the material is. /l thereby fedinto the battery in the centre of the group of `stamps and distributed equally to. all. The ground material is delivered through the screen into the surrounding trough A?, whence itfmay be shovelled out or make a continuous exit throughsuitably arrangeddischarge spouts. \The 'coverS is tted into the mouth S l -of the screen in such manner that it may rise and fall therein, still keeping themouth closed.A .The hoppers T l are secured firmly to the'sole-plate A1 of -the steam cylinders, and the cover Sl of the screen is secured to the l spout Tl, and hence the hoppers, spouts, and cover are all adjusted up or down along with the steam cylinders. t The same arrangement of valve and valve gear, and the same adjustment of steam cylinder, are applicable when a single cylinder and stamp are used,.or when vany number greater or less than the number represented. I doA Y l not, however, consider the valve gear represented as 'a part of this invention, but havc'merely represented it for the purpose of illustrating a mode-of carrying out the direct application of steam to the working-of stamps, 1 and shallA probably make' it the subject of a separate. and distinct application for a patent.

i What Iclaim as my i'nvention, and desire to secure by Letters Patent, is- Y, 1. The arrangement of thestamps in'the form of a group, in combination with a central feed opening and j surrounding screen and delivery receptacle, substantially as and for the purpose herein specied.

2. In the direct application of steam power to stamping mills or hammers, I claim providing for the adjustment of 'the steam cylinders and their valves toward and 'from the battery substantially as herein described, whereby the wear of `the stamps and the battery may be compensated for, and a uniform, v'or nearly uniform, clearance between the pistons and the tops and bottomsof the steam cylinders may be maintained.

3.l In combinationwith the above specified provision "for lthe adjustment of the steam cylinders, I claim the. attachment of the feeding hopper or hoppers to the said cylinders, substantially as and for the. purpose heroin set forth. A i

v W. WRIGHT.

Witnesses:

A. LuGLnno,\ f A 7' i J. W. GooMBs. 

